US8234887B2 - Washing machine having steam generator - Google Patents

Washing machine having steam generator Download PDF

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Publication number
US8234887B2
US8234887B2 US11/629,385 US62938506A US8234887B2 US 8234887 B2 US8234887 B2 US 8234887B2 US 62938506 A US62938506 A US 62938506A US 8234887 B2 US8234887 B2 US 8234887B2
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Prior art keywords
water supply
flow line
steam
water
generating portion
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US11/629,385
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English (en)
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US20080250822A1 (en
Inventor
In Geun Ahn
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LG Electronics Inc
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LG Electronics Inc
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Assigned to LG ELECTRONICS INC. reassignment LG ELECTRONICS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AHN, IN GEUN
Publication of US20080250822A1 publication Critical patent/US20080250822A1/en
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/40—Steam generating arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/04—Heating arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/081—Safety arrangements for preventing water damage
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/088—Liquid supply arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/203—Laundry conditioning arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/26—Heating arrangements, e.g. gas heating equipment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/28—Methods of steam generation characterised by form of heating method in boilers heated electrically
    • F22B1/282—Methods of steam generation characterised by form of heating method in boilers heated electrically with water or steam circulating in tubes or ducts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/28—Methods of steam generation characterised by form of heating method in boilers heated electrically
    • F22B1/288—Instantaneous electrical steam generators built-up from heat-exchange elements arranged within a confined chamber having heat-retaining walls

Definitions

  • the present invention relates to drum type washing machines, and more particularly, to a new type of steam generator for a drum type washing machine, which enables fast and effective washing and drying of laundry, and can provide a refresh effect of removal of wrinkles from, and sterilization of the laundry.
  • the drum type washing machine washes laundry by using friction between laundry and a drum rotated by driving power of a motor in a state detergent, washing water, and the laundry is introduced to the drum, shows almost no damage to the laundry, and no entangling of the laundry, and can provide a pounding and rubbing washing effect.
  • a drum type washing and drying machine washes the laundry the same as the drum type washing machine and along with this, even dries the laundry of which washing is finished.
  • the drum type washing and drying machine dries the laundry by Supplying hot air to the drum through a drying duct having a drying heater and a fan mounted thereon.
  • the soaking before washing consumes a large amount of washing water.
  • An object of the present invention is to provide a new type of steam generator for a drum type washing machine, which enables fast and effective washing and drying of laundry, and can provide a refresh effect of removal of wrinkles from, and sterilization of the laundry.
  • the object of the present invention can be achieved by providing a steam generator for a drum type washing machine including a steam generating portion having a water supply inlet at one side and an outlet at the other side, and a space between the water supply inlet and the outlet, a water supply flow line connected to the water supply inlet for guiding the water to the space, a discharge flow line connected to the outlet for guiding a flow of steam generated at the space, a bypass flow line connected to the water supply flow line for discharging the water overflowing from the steam generating portion in a case water is supplied in a state the outlet and/or the discharge flow line are blocked, and a heater for heating the water supplied through the water supply inlet to generate the steam.
  • a washing machine in another aspect of the present invention, includes a tub in a body of the washing machine, a drum rotatably mounted in the tub, a drying duct for guiding hot air to the drum, and a steam generator including a steam generating portion having a water supply inlet at one side and an outlet at the other side, and a space between the water supply inlet and the outlet, and a heater for heating the water supplied through the water supply inlet to generate the steam.
  • a washing machine in another aspect of the present invention, includes a tub in a body of the washing machine, a drum rotatably mounted in the tub, a detergent box for supplying detergent to the drum, a detergent box water supply pipe for guiding water to the detergent box, a drying duct for guiding hot air to the drum, and a steam generator including a steam generating portion having a water supply inlet at one side and an outlet at the other side, and a space between the water supply inlet and the outlet, a water supply flow line connected to the water supply inlet for guiding the water to the space, a discharge flow line connected to the outlet for guiding a flow of steam generated at the space, a bypass flow line connected to the water supply flow line for discharging the water overflowing from the steam generating portion in a case water is supplied in a state the outlet and/or the discharge flow line are blocked, and a heater for heating the water supplied through the water supply inlet to generate the steam.
  • the present invention has the following advantages.
  • washing water can be saved while enhancing a washing effect in washing.
  • bypass flow line prevents the steam generating portion from being broken by a water pressure in a case water is supplied thereto in a state the outlet and/or the discharge flow line of the steam generating portion is blocked.
  • FIG. 1 illustrates a longitudinal section of a drum type washing and drying machine in accordance with a preferred embodiment of the present invention, schematically;
  • FIG. 2 illustrates a cross section of a drum type washing and drying machine in, accordance with a preferred embodiment of the present invention, schematically;
  • FIG. 3 illustrates a plan view of a drum type washing and drying machine in accordance with a preferred embodiment of the present invention, schematically;
  • FIG. 4 illustrates a perspective view of the steam generator in FIG. 3 , schematically
  • FIG. 5 illustrates a section across a line I-I in FIG. 4 ;
  • FIG. 6 illustrates a section across a line II-II in FIG. 4 ;
  • FIG. 7 illustrates a cross section of a drum type washing and drying machine in accordance with a preferred embodiment of the present invention showing another type of a steam supply structure, schematically.
  • FIG. 1 illustrates a longitudinal section of a drum type washing and drying machine in accordance with a preferred embodiment of the present invention, schematically
  • FIG. 2 illustrates a cross section of a drum type washing and drying machine in accordance with a preferred embodiment of the present invention, schematically.
  • FIG. 3 illustrates a plan view of a drum type washing and drying machine in accordance with a preferred embodiment of the present invention schematically
  • FIG. 4 illustrates a perspective view of the steam generator in FIG. 3 schematically
  • FIG. 5 illustrates a section across a line I-I in FIG. 4
  • FIG. 6 illustrates a section across a line II-II in FIG. 4 .
  • FIG. 7 illustrates a cross section of a drum type washing and drying machine in accordance with a preferred embodiment of the present invention showing another type of a steam supply structure, schematically.
  • the drum type washing and drying machine in accordance with a preferred embodiment of the present invention includes a body 100 of an exterior of the drum type washing and drying machine, a water supply valve 200 on the body 100 for supplying water from an outside of the drum type washing and drying machine, a substantially cylindrical tub 300 in the body 100 having a hot air inlet 310 and a hot air outlet 320 , a drum 400 rotatably mounted in the tub 300 , a drying duct 500 having a drying heater 510 for heating air to be supplied to the drum 400 and a fan 520 for forced blowing of hot air heated by the drying heater 510 to the drum 400 built therein, for supplying hot air to the drum 400 , and at least one steam generator 600 for supplying steam to the drum 400 .
  • the steam generator 600 includes a steam generating portion 610 having a space 611 for flow of water and a water supply inlet 612 and an outlet 613 in communication with the space respectively, a water supply flow line 620 connected between the water supply valve 200 and the water supply inlet 612 of the steam generating portion 610 , a discharge flow line 630 connected between the outlet 613 of the steam generating portion 610 and the tub 300 , a bypass flow line 660 connected to the water supply flow line 620 for discharging water overflowing from the steam generating portion if water is supplied in a state the outlet 612 and/or the discharge flow line 630 is blocked and a heater 640 for fast heating of the water introduced to the space 611 in the steam generating portion 610 .
  • the steam generator 600 further includes a temperature sensor (not shown) for sensing a temperature of the steam generating portion 610 .
  • the temperature sensor is provided for controlling the heater 640 according to a temperature of the steam generating portion, and it is preferable that overheating of the heater 640 is prevented in advance by using a thermo-fuse which is to be gone at a temperature higher than a preset temperature to cut off the power to the heater 640 .
  • the space 611 also has a tubular shape, and the water supply inlet 612 and the outlet 613 of the steam generating portion 610 are formed at opposite ends of the steam generating portion 610 .
  • the steam generating portion 610 is tilted such that the outlet 613 is positioned higher than the water supply inlet 612 , for preventing discharge of, not steam, but water through the outlet 613 .
  • the space 611 of the steam generating portion 610 has a sectional area greater than a sectional area of the water supply flow line 620 or a sectional area of the discharge flow line 630 , for smooth supply of water to the space 611 of the steam generating portion 610 , and smoother discharge of the steam from the space 611 .
  • the discharge flow line 630 has a sectional area smaller than the sectional area of the water supply flow line 620 .
  • the steam generating portion 610 is formed of metal having good conductivity and low density, such as aluminum, by die casting.
  • the water supply flow line 620 includes a water supply valve 200 (see FIG. 3 ), a water supply pipe 621 connected to the water supply valve, and a water supply pipe 622 between the water supply pipe 621 and the water supply inlet 612 of the steam generating portion 610 .
  • the discharge flow line 630 includes a discharge pipe 632 provided to the outlet 613 of the steam generating portion 610 , and a steam supply pipe 631 between the discharge pipe 632 and the tub 300 .
  • the steam supply pipe 631 has a nozzle shaped end 631 a for smooth supply of the steam.
  • the steam may be supplied to the drum 400 through the drying duct 500 by connecting the steam supply pipe 631 between the outlet 613 of the steam generating portion 610 and the drying duct 500 .
  • the steam supply pipe 631 is connected between the outlet 613 of the steam generating portion 610 and the drying duct 500 for supplying the steam to the drum 400 through the drying duct 500 .
  • the steam supply pipe 631 has a steam discharging end 631 a provided on a side where the hot air is discharged from the drying duct 500 .
  • the fan 520 in the drying duct 500 is driven.
  • the steam to the drying duct 500 may be supplied to the drum 400 with the hot air by putting the drying heater 510 into operation at the same time with putting the fan 520 in the drying duct 500 into operation.
  • the bypass flow line 660 is connected between the water supply flow line 620 of the steam generating portion 610 and a flow line washing water is introduced from the water supply valve 200 to the tub 300 , for discharging water overflowing from the steam generating portion.
  • bypass flow line 660 permits the water to overflow from the steam generating portion to an outside of the water supply line, to prevent the water from flowing in a reverse direction toward the water supply valve 200 .
  • the bypass flow line 660 is connected to a detergent box water supply line 710 connected between the detergent box 700 and the water supply valve 200 .
  • bypass flow line 660 is connected between the detergent box water supply line 710 and the water supply pipe 621 of the water supply line 620 .
  • the bypass flow line 660 , the water supply pipe 621 of the water supply flow line 620 may be connected with a Y connector 900 .
  • the Y connector 900 may include a water supply guide portion on the water supply pipe 621 of the water supply flow line 620 and a bypass guide portion 920 branched from the water supply guide portion 910 having the bypass flow line 660 connected thereto.
  • bypass guide portion 920 is branched from the water supply guide portion 910 in a direction opposite to a direction of a water flow of the water supply pipe 621 of the water supply flow line 620 .
  • the steam generator 600 of the present invention can prevent the steam generator 600 from being broken down in advance as the water flowing in a reverse direction can be discharged to the bypass flow line 660 connected to the water supply flow line 620 through the Y connector 900 even if the steam discharge flow line is blocked.
  • bypass flow line 660 may be connected to the detergent box 700 directly, for discharging the water overflowing in a reverse direction from the space of the steam generating portion 610 to the detergent box 700 , directly.
  • the heater 640 of the steam generator 600 is a sheath heater, molded to be buried in the steam generating portion 610 around the space 611 for rapid heating of the water flowing in the space 611 .
  • the heater 640 buried in the steam generating portion 610 , so that the heater 640 generates heat to heat the steam generating portion 610 itself of aluminum rapidly for heating the water flowing in the space 611 of the steam generating portion 610 , to generate the steam.
  • the steam generator 600 is mounted with brackets 810 , and 820 separate from the body 100 of the exterior of the drum type washing and drying machine.
  • the body 100 of the drum type washing and drying machine has the supplementary frame 810 extended in a front/rear direction of the body 100 , the supporting bracket 820 at one side is fixed to the supplementary frame 810 at a front side, and the steam generating portion 610 is coupled to the other side of the supporting bracket 820 , to mount the steam generator 600 on the body 100 of the drum type washing and drying machine.
  • the steam generating portion 610 is fastened to the other side of the supporting bracket with screws.
  • the steam generating portion 610 has fastening bosses respectively having fastening holes on an upper surface
  • the supporting bracket 820 has fastening holes matched to the fastening bosses at the other side, and as the fastening holes and screws are fastened to fastening holes and the fastening bosses, the steam generating portion 610 is coupled to the supporting bracket 820 .
  • the supplementary frame 810 secured to the body 100 enhances rigidity of the body 100 to reduce vibration and noise taking place when the drum type washing and drying machine performs a cycle, like spinning.
  • the washing water and the detergent is mixed at the detergent box 700 , and introduced to the drum 400 , and at the same time with this, the steam generator 600 is put into operation, to supply high temperature steam to the drum 400 through the tub 300 .
  • the supply of the hot steam to the drum 400 at an initial stage of the washing makes smooth soaking of the laundry and separation of dirt, to enhance a washing effect even with a small amount of washing water.
  • the soaking of the laundry and separation of the dirt can be male more quickly and effective.
  • the steam generator 600 may supply washing water to the drum 400 of the drum type washing and drying machine instead of the steam to shorten a cycle time period in the washing or spinning.
  • the steam generator 600 may put into operation in a state power to the heater 640 is turned off, to supply the washing water to the drum 400 even through the steam generator 600 .
  • a time period for receiving the washing water can be reduced thereby permitting to reduce a total cycle time period.
  • the steam generator 600 is operated, to generate hot steam and supply the hot steam to the drum 400 through the tub 300 .
  • the hot air and the hot steam generated thus is introduced to the drum 400 , to dry the laundry.
  • the hot air as well as the hot steam is supplied to the drum 400 , to elevate a temperature of the drum 400 , quickly.
  • the laundry in the drum 400 is dried more quickly and sterilized by the hot steam, and has wrinkles thereof unfolded by the hot steam, to provide a refreshing effect.
  • the steam generator 600 If it is intended to perform a separate refresh cycle for unfolding wrinkles of, and sterilizing the laundry other than the washing and the drying, the steam generator 600 generates hot steam and supplies to the drum 400 through the tub 300 .
  • the laundry instead of the washing dr drying, by only supplying hot steam to the laundry, the laundry has the wrinkles removed therefrom and is sterilized.
  • the drum 400 is rotated to supply the steam from the steam generator 600 to the laundry, uniformly.
  • a reverse flow of the water overflowing from the steam generating portion 610 toward the water supply valve 200 can be prevented and breakage of the steam generating portion 610 and the water supply valve 200 caused by a water pressure flowing to the steam generating portion 610 through the water supply valve 200 can be prevented in advance.
  • the present invention has an industrial applicability since washing water can be saved while a washing effect is enhanced in washing, and drying efficiency, and performance can be improved, wrinkles on the laundry can be minimized more conveniently, and hygienic laundry can be obtained to improve consumers satisfaction.
  • the present invention also has an industrial applicability since the refreshing effect of the laundry improves satisfaction of the users, and the possibility of the disposal of the overflowing water from the steam generating portion enables to prevent the water supply valve and the steam generating portion from breaking.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
US11/629,385 2005-03-25 2006-03-24 Washing machine having steam generator Active 2028-08-01 US8234887B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR1020050025043A KR100808176B1 (ko) 2005-03-25 2005-03-25 드럼세탁기용 스팀발생장치
KR10-2005-0025043 2005-03-25
PCT/KR2006/001104 WO2006101377A1 (en) 2005-03-25 2006-03-24 Washing machine having steam generator

Publications (2)

Publication Number Publication Date
US20080250822A1 US20080250822A1 (en) 2008-10-16
US8234887B2 true US8234887B2 (en) 2012-08-07

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US11/629,385 Active 2028-08-01 US8234887B2 (en) 2005-03-25 2006-03-24 Washing machine having steam generator

Country Status (10)

Country Link
US (1) US8234887B2 (de)
EP (1) EP1863968B1 (de)
KR (1) KR100808176B1 (de)
CN (1) CN101184885B (de)
AT (1) ATE525511T1 (de)
AU (1) AU2006225405B2 (de)
DE (1) DE112006000051T5 (de)
ES (1) ES2371181T3 (de)
RU (1) RU2362850C1 (de)
WO (1) WO2006101377A1 (de)

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WO2014093150A1 (en) 2012-12-14 2014-06-19 Ppg Industries Ohio, Inc. Bending device for shaping glass for use in aircraft transparencies
US12486611B2 (en) 2022-04-05 2025-12-02 Haier Us Appliance Solutions, Inc. Dryer appliance and dispensing system

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AU2006225405A1 (en) 2006-09-28
RU2007139454A (ru) 2009-04-27
DE112006000051T5 (de) 2007-10-25
CN101184885B (zh) 2011-12-28
WO2006101377A1 (en) 2006-09-28
US20080250822A1 (en) 2008-10-16
ES2371181T3 (es) 2011-12-28
AU2006225405B2 (en) 2009-07-02
EP1863968B1 (de) 2011-09-21
RU2362850C1 (ru) 2009-07-27
EP1863968A1 (de) 2007-12-12
KR100808176B1 (ko) 2008-02-29
KR20060102952A (ko) 2006-09-28
CN101184885A (zh) 2008-05-21

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